[Graph with truth] Dimensional Analysis

Dimensional Analysis (dimensionalanalysis) refers to the unit of a physical quantity, which is divided into basic physical units and the product obtained after multiplication. These basic physical units do not necessarily adopt the international unit system or other unit systems, but can be expressed using abstract symbols. These basic physical units include length, time, quality, temperature, current, light intensity, amount of material. (Via Wikipedia)

 

Planck energy: 1.956e9 Joule = 1.956e9 N * m

Pressure at theearth's core: From the top part of the 1.55e 11 Pa to about 3.875 E 11 Pa = 3.875 E11 N/m2

Prius combined EPA gas mileage: 50 MPG = 2.125e7 M/m3

Minimumwidth of the English Channel: 34 km = 3.4e4 m

The estimation result based on the above data is about 3.15.

 

In order to better understand and ensure accuracy, the squirrel will make some changes to the source image, and the results will not be affected.

 

Note: the unit of EPA fuel consumption is MPG (miles per gallon, mileper gallon)

Thanks to Jerry for his data and analysis.

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Address: http://www.cnblogs.com/saltless/archive/2010/11/15/1877350.html